Lock.



J. SINKOVIGIL LOOK.

APPLICATION FILED 1 513.17 1912.

Patented Aug. 20, 1912.

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J imimmh Wikwaooeo J. SINKOVIGH.

LOOK.

APPLICATION FILED I'EB.17, 1912. v 1,036, 1 56, Patented Aug. 20, 1912.

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J. SINKOVIGH.

LOCK.

APPLICATION FILED r2347, 1912.

Patented Aug: 20, 1912.

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Jksz nlwmlch To all whom it irn s LOCK.

u may concern Be it known that I, JOSEPH SINKOVICH, a citizen of the UnitedStates, residing at' Butte, in the county of Silverbow', State of Montana, have invented certain new and useful; Improvements in Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention,

suchas will enable others skilled in'the art.

to make and use ,the p I 1 a detall topplan viewthereoflFig. 8 is at to which it appertains same. 1

This invention locks and more particularly to door lo'cksof that type in which a pivoted tumbler is.eIn y view of the tumblen,

ployed'.

The principal object of this inventihn is to provide a lock of the character described in which means are provided for normally preventing the return of the lock bolt til released by the key. 1.

Another object of pivoted on the shank ofr-the bolt and nor-- mall disposed out of the 'pathof movement of the key, and means adapted to be actuated .by the key to release the. pawl, and

. lock will be returned thereby cause the same to be disposed in the path of movement of the key, wherebyupon movement of the key against the pawl, the

initial position. T I i Another object of the inventiouiis to provide a lock of the character 'vdescribed'which iscomparativelyv simple in construction; it

- being composedwof a minimumv numberrofparts, and :is therefore cheap- -tomanufacture. l i .l

Withthese and other objects in view, the

invention consists in the construction and novel combination of parts hereinafter'fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended; it being understood that various changes in the form, proportion, size and minor details of construction withinthe scope of the claims, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings: Figure 1 is a perspective view of a lock constructed in accordance with my invention, Fig. 2 is. a front elevaremoved to better disclose certain. features::' ilboltby means of a flatspri'ng" 27,isaid.spi 'ing relates to improvements in} f v r 1 showing the ,camaarm ifor;actuating. the

drawings. "i 1x the invention pro vide a lock for the purposedescribed-which' includes a lock bolt, a spring actuated pawl to its, inoperative or I Application filefd Feb ruary 17, 1912. Serial No. 678,304.

; Fig. 6 1s a detail view, partly, irisectionof the outer and'inner-key cylinders, Fig. is

perspective view of the inner key cylinder,

springdetent, and, is} a perspective Like referencenumerals designate correspending; parts ;fl1l all-fthe figures of the Referring to drawings, the invention whole the}; reference numeral 5 and I mounted ln'the upperportion of said casing is a spring actuatedjlatchJoolt 6,. of ordinary constructiomi Located in the bottomapor- .also ofordinary construction. Inasmuch as i the latch.v bolt and thumb bolt areiof comf invention'i f it is deemed that a specificde- -scr1pt1onfthereof. 1s unnecessar ed the headlO of a lock-bolt ll slidinglin a head with the usual stop 14, and on the upfper edge of, theshank 12 there is provided of the sha'nlr12 is formeduwiththe usual key sweeps 16,. and the resultant talons 17.

Secured to the rear wall --l8 of the casing and above the headlO 'is a pin 19 to which tion extended downwardly, at 23, and thence 1 forwardly asxat 24,, the free end bearing against the body-portion 22..

portion2 2and downwardly extending portion 23, isQa lug 26 whichis-adaptedito be urged,into. any, one of the notches 15 of vthe 1 tion of the 'casingiska thumb-bolt 7 which is mon const'ruction and form no parto'f this a plurality of notches 15. The lower edge ATES PATIENT, F Q

Patented Aug. 20, 1912;} i

. view showing the pawl retained inits inop erative'position by means of a sprlng detent, I

V t comprises acas1ng1wh1ch-1s designated .as a

Formedin one end wall 8 of, the 'casing I and intermediate the latch and thumb bolts is an opening 9 in which is slidably mount, i

suitable vbracket 13, which is secured 'to -the .1 I casing. This latch bolt is ,provided on its I v one end 20 of; a tumbler 21 is pivoted. This tumhlerfjincludes a body portion 22 which normally. extends }longitudinally of and V abovethelo'ck boltrll, and has it s end por thereof extending-forwardly, as at 25,.and v Formedin theangle. between the bodybeing fixedat one end to a post 28 which I is' carried by the casing. Associated with the casing is a cover plate 29, and this cover is formed with a key opening 30 which is disposed at a point in close proximity to the key sweeps16, so that upon the insertion and rotation of a key 31, the talons 17 will be successively engaged to slide the lock bolt 11 outwardly in a step by stepmovement. It will be observed in this connection that there is preferablyshown a pair of sweeps 16, and a pair of talons 17 Thus a will e obvious that inorder to extend 1 the bolt 11 to its limit, two manipulations or rotationsof the key will be necessary. '.The keysweep 16 which is farthest away 3 from the head 10 of the bolt is elongate fl so that whenthe bolt is disposed in its operative or extended position, the reverse ro tation of the key will not engage any sweep, and therefore the bolt will normally be locked by means of the tumbler againstre' turn movement. In order, therefore, to unlock the bolt or in other words .to return the same to its inoperative or initial position, the following mechanism is employed: Secured to the lower rear. end of the shanki 12'of the bolt is a mounted upon this pm is a forwardly exf pin 32, and pivotally tending pawl 33, The forward end of this pawl, forms 'a resultant talon 34, and this pawl is normally urged to swing down- I wardly upon the pin 32' so that the talon 34 will be disposed in the "path of the key 31 by means of'a flat spring 35 which has one end fixed to a post 36 carried by the bolt 11. In order to limit the downward movement of the pawl 33, there is provided a pin 37 which is carried by the bolt below the pivot pin 32.

In order to normally-hold the pawl 33 out of the path of the key 31, said pawlis centrally formed with anopening 38 which registers with an opening 39 formed in the cover" 29. A spring arm 40 is fixedly secured, as at 41', to the cover 29, and is disposed atone side of the key opening 30.

The upper end of this arm is reduced to form an inwardly extending pin 42 which is normally disposed within the openings 38 and 39 above described. It will thus be observed that by means of this spring arm the pawl 33 is normally held out of the path of the key.- Inorder, however, to release the pawl so that the spring 35 may urge the same into the path of the key so that the latter may engage the talon34 of said pawl to return the bolt to its initial position, the following mechanism is employed: A key cylinder 43 projects later-- ally from the cover 29, and is secured to said cover by means of attaching feet 44 I and 45 respectively, said feet being secured to the cover by bolts 46 or other suitable fastening means. The cylinder 43 registers der 43 for rotation therein, and the forward end of the inner cylinder projects beyond however, being of less width than the slot 147 of the outer cylinder. Extending radially from the lower end of the inner cylinder the forward end of the outer or stationary cylinder 43. The inner cylinder 49 is also longitudinally" slotted, as at 50, this slot,

49 is a cam finger 51 which terminates at itsouter end in an'ofi'set point 52. This finger projects between the lower end 48 of the outer cylinder 43 and the cover 29, and

p is adapted upon rotation of the inner eylinder 49 in one direction to be forced under thefree end of the spring 40, and thereby withdraw the pin 42 from the opening 38 6 of the pawl 33, and thereby permit of the spring 35 to force said pawl downwardly into the path of movement of the key 31.

In order to actuate the inner cylinder by means of the key, said key is first drawn outwardly from engagement with the bolt 11, p and is then given a slight twist to-the right,

the head of the key thus engaging the respective edge of the slot 50 and thereby causing the 1nner cylinder to be rotated until said edge is flush with the respective edge of the slot 47 of the'outer cylinder. -W hen the inner cylinder has assumed this position, the point 52 of the cam finger 51 will have shifted the spring arm 40 to release the pawl a 33 as above described. The operator then returns the key to its operative position, and

upon rotation thereof, the head of the key will be caused to engage the talon 34 of the pawl 33, and as a result, will shift the lock bolt 11 rearwardly for one step, and upon the next rotation of the key the respective talon 17 will be engaged to further return the bolt. It will be understood that as soon as the operator turns the key to the left, the head of said key will engage the pawl and raise the same to such a position as to permit of the pin 42 to be forced thereinto by means of the sprin arm 40.

What is claimed is: I 1. In alock, the combination with a casing, of a bolt slidably mounted therein and formed with a plurality of talons adapted to be successively engaged by a key, of a 5 ring a V actuated pawl pivoted on the bolt and a apted to be disposed in the path of movement of the key when the bolt is in its last successive position, a spring pin carried by the casing and adapted when the pawl is actuated upon the last movement of the key to hold said pawl out of the path of movement of the key, and a rotary key-controlled mearlis for actuating the pin to release the aw P 2, In a lock, the combination with a casing, of a bolt slidably mount-ed therein and formed with a lurality of talons adapted to be successive y engaged by a ke of a spring actuated pawl pivoted on e bolt and adapted to be disposed in the path of movement of the key when the bolt is in its last successive position, a spring pin carried by the casing and adapted when the awl is actuated upon the last movement of the key to hold sai pawl out of the path of mounted on the cas ng, and a cam finger projecting laterally from the c linder and adapted upon movement of the atter to engage and release the pin from the pawli v3. In a lock, the combination with a casing, of a bolt s'lidably mounted therein and mounted for rotation within t a rotary key cylinder formed with a plurality of talons' adapted to be successive y engaged by a key, of a spring actuated pawl ivoted on the bolt and adapted to be dispose ment of the key when the bolt is in its last successive position, a sprin the casing and adapted w en the pawl is actuated u on the lastmovement of the key to hold said pawl out of the path of movement of the key, an outer key cylinder fixedly secured to the casing, a cylinder loosely e outer cylindei', a cam finger projecting laterally from the inner end of the inner cylinder and in the path of move-,

pin carried by adapted upon rotation of the latter to actuate the spring pin to release the pawl.

' In testimony whereof, I afiix .my signature, in presence of two witnesses.

Witnesses: M. V. CoNRoY, Jo'snrnmn Am;

JOSEPH SINKOVIOH. f 

